If anyone needs/wants a nice aluminum swingarm,I have two. One is for a 1980 KTM 420 and the other from a 1978 KTM 400. Bought both by mistake. Would trade for a aluminum arm for a 79 250MC or sell outright for $25.00 ea.
Someone correct me if I'm wrong, but I don't think they used aluminum until 1979. I have an extra 1979 250 frame with an aluminum swingarm, but the frame is a over the counter non-stamped frame, so I can't verify that it is a 250 frame. Do you have measurements that I can check on the swingarm to make sure it is correct for your bike?
Michael R. Winter
1974 250 Harescrambler
1977 250 MC5 Project
1978 250 MX6
1979 250 KTM Project
1980 250 MX KTM